/* ==========================================================================
   安徽海铭塑业有限公司 · 企业官网样式 v4
   设计定位：工程制造企业的现代商务感
   · 稳：深海军蓝 + 大留白 + 严格网格 + 细线秩序
   · 酷：深色大区块、极淡光晕、精致微动效、工程化数字排版
   ========================================================================== */

:root {
  /* 深色体系（用于深色区块与文字） */
  --navy-950: #061423;
  --navy-900: #0a1e33;
  --navy-850: #0d2740;
  --navy-800: #12375a;
  --navy-700: #1a4d78;
  --navy-600: #226299;
  --navy-500: #2f78b0;
  --navy-300: #8fb0cb;
  --navy-100: #dde8f2;
  --navy-050: #f2f7fb;

  --gold-600: #8a6620;
  --gold-500: #a8812f;
  --gold-400: #c39a45;
  --gold-100: #f5ecd9;

  --ink-900: #12161a;
  --ink-800: #1e242a;
  --ink-700: #2f3740;
  --ink-600: #4a545e;
  --ink-500: #5e6772;
  --ink-400: #6d767f;
  --ink-300: #b6bcc2;
  --ink-200: #d6dade;
  --ink-100: #e6e9ec;
  --ink-050: #f4f5f7;

  --paper: #ffffff;
  --paper-warm: #f8f9fa;
  --line: #e2e6ea;
  --line-strong: #c9d0d6;

  --radius-sm: 2px;
  --radius: 3px;
  --radius-lg: 4px;

  --wrap: 1140px;
  --gutter: 32px;
  --header-h: 68px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-out: cubic-bezier(.16, .84, .44, 1);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei UI",
          "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Helvetica Neue", Arial, var(--font);
  --font-mono: "SF Mono", "Cascadia Mono", "Consolas", "Roboto Mono", monospace;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-600);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
img { height: auto; }

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  color: var(--ink-900);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: .005em;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 4.2vw, 3rem); font-weight: 600; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 700; }
h3 { font-size: clamp(1.05rem, 1.6vw, 1.22rem); font-weight: 700; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--navy-700); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--navy-600); }
strong { color: var(--ink-800); font-weight: 600; }
ul, ol { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 2px solid var(--navy-600); outline-offset: 3px; }

.skip-link {
  position: absolute; left: 50%; top: -60px; transform: translateX(-50%);
  z-index: 999; padding: 10px 18px; background: var(--navy-900); color: #fff;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; color: #fff; }
.nowrap { white-space: nowrap; }
.muted { color: var(--ink-400); font-size: .9em; }

/* 仅读屏可见：承载 aria-live 播报文本，不参与视觉布局 */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding: clamp(68px, 7.5vw, 108px) 0; }
.section-alt {
  background: var(--paper-warm);
  border-top: 1px solid var(--line);
}

/* 深色区块：基调抬亮一档，避免整页发闷 */
.section-dark {
  position: relative;
  background: linear-gradient(170deg, #0d2740 0%, #0a1e33 58%, #081827 100%);
  color: rgba(255, 255, 255, .8);
  overflow: hidden;
}
.section-dark::before {
  content: "";
  position: absolute;
  top: -30%; right: -12%;
  width: 62%; height: 130%;
  background: radial-gradient(closest-side, rgba(47, 120, 176, .18), transparent 72%);
  pointer-events: none;
}
.section-dark::after {
  content: "";
  position: absolute;
  bottom: -34%; left: -14%;
  width: 54%; height: 110%;
  background: radial-gradient(closest-side, rgba(168, 129, 47, .1), transparent 72%);
  pointer-events: none;
}
.section-dark > .wrap { position: relative; z-index: 1; }
.section-dark h2, .section-dark h3 { color: #fff; }

.section-head { max-width: 800px; margin-bottom: clamp(34px, 4vw, 56px); }
.section-lede { font-size: 1.06rem; line-height: 1.9; color: var(--ink-500); max-width: 56ch; }
.section-dark .section-lede { color: rgba(255, 255, 255, .7); }

/* 标签：细线起首 + 字距，无底色 */
.tag {
  display: block;
  margin-bottom: 20px;
  padding-left: 44px;
  position: relative;
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.tag::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 30px; height: 1px;
  background: var(--gold-500);
}
.section-dark .tag { color: rgba(255, 255, 255, .5); }
.section-dark .tag::before { background: var(--gold-400); }

.grid-2 {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: clamp(40px, 6vw, 92px);
  align-items: start;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 30px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: .88rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: .05em;
  cursor: pointer;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: background-color .22s var(--ease), color .22s var(--ease),
              border-color .22s var(--ease), transform .22s var(--ease);
}

.btn-primary {
  background: var(--navy-800);
  color: #fff;
  border-color: var(--navy-800);
}
.btn-primary:hover {
  background: var(--navy-700);
  color: #fff;
  border-color: var(--navy-700);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline { background: transparent; color: var(--navy-800); border-color: var(--line-strong); }
.btn-outline:hover { background: var(--navy-800); color: #fff; border-color: var(--navy-800); }

.hero .btn-outline { color: #fff; border-color: rgba(255, 255, 255, .34); }
.hero .btn-outline:hover { background: #fff; color: var(--navy-900); border-color: #fff; }

.btn-ghost { background: transparent; color: var(--ink-700); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--ink-050); color: var(--ink-900); border-color: var(--ink-300); }

.btn-sm { padding: 9px 20px; font-size: .82rem; }
.btn-block { width: 100%; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(255, 255, 255, .93);
  backdrop-filter: saturate(170%) blur(12px);
  -webkit-backdrop-filter: saturate(170%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background-color .3s var(--ease);
}
.site-header.is-scrolled { background: rgba(255, 255, 255, .99); }
.site-header.is-open { background: #fff; }

/* 顶部进度条：金色细线，滚动时延伸 */
.scroll-progress {
  position: absolute;
  left: 0; bottom: -1px;
  height: 2px; width: 0;
  background: linear-gradient(90deg, var(--navy-700), var(--gold-500));
  transition: width .1s linear;
}

.header-inner { display: flex; align-items: center; gap: 22px; height: var(--header-h); }

.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 36px; flex-shrink: 0;
}
.brand-mark img, .brand-mark svg { width: 100%; height: 100%; object-fit: contain; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.24; }
.brand-text strong { font-size: .95rem; color: var(--ink-900); letter-spacing: .05em; font-weight: 600; white-space: nowrap; }
.brand-text em { font-style: normal; font-size: .54rem; letter-spacing: .2em; color: var(--ink-400); }
/* 窄屏改用短品牌名（见 640px 断点），桌面端显示全称 */
.brand-short { display: none; }

.nav { display: flex; align-items: center; gap: 0; margin-left: auto; }
.nav a {
  position: relative;
  padding: 10px 10px;
  font-size: .85rem;
  font-weight: 400;
  letter-spacing: .05em;
  white-space: nowrap;
  color: var(--ink-500);
  transition: color .2s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px; bottom: 4px;
  height: 1px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .32s var(--ease-out);
}
.nav a:hover { color: var(--ink-900); }
.nav a:hover::after, .nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--ink-900); }

/* 英文导航标签整体比中文长，收紧字号 / 字距 / 内边距，
   避免页头把语言切换器与电话按钮挤出容器（挤出时按钮位置会跟着漂） */
html[lang="en"] .nav a { padding: 10px 8px; font-size: .82rem; letter-spacing: .015em; }
html[lang="en"] .nav a::after { left: 8px; right: 8px; }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-actions .btn-ghost {
  border: none;
  padding: 8px 0;
  font-size: .85rem;
  letter-spacing: .03em;
  color: var(--ink-700);
}
.header-actions .btn-ghost:hover { background: none; color: var(--navy-800); }

/* 语言切换：当前语言为实心块，另一语言为链接 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.lang-switch .lang-opt {
  padding: 6px 10px;
  font-size: .74rem;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: .08em;
  color: var(--ink-500);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.lang-switch a.lang-opt:hover { background: var(--ink-050); color: var(--ink-900); }
.lang-switch .lang-opt.is-current { background: var(--navy-800); color: #fff; }

/* 页脚语言切换：深色底上换配色 */
.site-footer .lang-switch { border-color: rgba(255, 255, 255, .26); }
.site-footer .lang-switch .lang-opt { color: rgba(255, 255, 255, .72); }
.site-footer .lang-switch a.lang-opt:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.site-footer .lang-switch .lang-opt.is-current { background: var(--gold-500); color: #1a1206; }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 1px;
  margin: 5px auto;
  background: var(--ink-700);
  transition: transform .28s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- HERO：深色 + 光晕 + 工程感数据条 ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: min(90vh, 800px);
  padding: calc(var(--header-h) + 70px) 0 clamp(88px, 11vw, 132px);
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}

.hero-media { position: absolute; inset: 0; z-index: -2; }
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 42%;
  filter: saturate(.86) contrast(1.06);
  transform: scale(1.06);
  animation: heroSettle 18s var(--ease-out) forwards;
}
@keyframes heroSettle { to { transform: scale(1); } }

/* 多层遮罩：保证白色文字可读性的同时，让厂区照片仍有存在感 */
.hero-veil {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(100deg,
      rgba(6, 20, 35, .9) 0%,
      rgba(10, 30, 51, .78) 34%,
      rgba(18, 55, 90, .42) 68%,
      rgba(18, 55, 90, .2) 100%),
    radial-gradient(120% 90% at 8% 50%, rgba(6, 20, 35, .55), transparent 62%);
}
.hero-grid {
  position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 78%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 78%);
}

.hero-inner { position: relative; max-width: 880px; }

.hero-eyebrow {
  display: block;
  margin-bottom: 24px;
  padding-left: 46px;
  position: relative;
  font-size: .71rem;
  font-weight: 400;
  letter-spacing: .3em;
  color: rgba(255, 255, 255, .58);
  text-transform: uppercase;
}
.hero-eyebrow::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 32px; height: 1px;
  background: var(--gold-400);
}

.hero-title { margin-bottom: 20px; color: #fff; }
.hero-title-cn { display: block; font-weight: 500; letter-spacing: .07em; }
.hero-title-en {
  display: block;
  margin-top: 16px;
  font-size: clamp(.6rem, 1.3vw, .73rem);
  font-weight: 400;
  letter-spacing: .38em;
  color: rgba(255, 255, 255, .38);
}

.hero-slogan {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 30px;
  font-size: clamp(.86rem, 1.6vw, .98rem);
  font-weight: 400;
  letter-spacing: .46em;
  color: rgba(255, 255, 255, .7);
}
.hero-slogan i { font-style: normal; color: rgba(196, 154, 69, .55); letter-spacing: 0; }

.hero-lede {
  max-width: 660px;
  font-size: 1.06rem;
  line-height: 1.95;
  color: rgba(255, 255, 255, .74);
}
.hero-lede strong { color: #fff; font-weight: 500; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 40px 0 0; }

/* 数据条：竖向细线分隔，工程化作息 */
.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  max-width: 760px;
  margin: 64px 0 0;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}
.hero-facts li {
  display: flex;
  flex-direction: column;
  padding-left: 26px;
  border-left: 1px solid rgba(255, 255, 255, .14);
}
.hero-facts li:first-child { padding-left: 0; border-left: none; }
.hero-facts strong {
  font-family: var(--font-num);
  font-size: clamp(1.55rem, 2.9vw, 2.1rem);
  font-weight: 400;
  line-height: 1;
  color: #fff;
  letter-spacing: .01em;
  white-space: nowrap;
}
/* 单位用小字号，避免数字看起来像图标 */
.hero-facts strong em {
  font-style: normal;
  font-size: .5em;
  margin-left: 3px;
  color: rgba(255, 255, 255, .6);
  letter-spacing: .04em;
}
.hero-facts span {
  margin-top: 12px;
  font-size: .81rem;
  line-height: 1.5;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .48);
  white-space: nowrap;
}

.hero-scroll {
  position: absolute;
  left: 50%; bottom: 34px;
  width: 1px; height: 46px;
  background: rgba(255, 255, 255, .2);
}
.hero-scroll span {
  position: absolute;
  left: 0; top: 0;
  width: 1px; height: 15px;
  background: var(--gold-400);
  animation: scrollLine 2.4s var(--ease) infinite;
}
@keyframes scrollLine {
  0% { transform: translateY(0); opacity: 0; }
  28% { opacity: 1; }
  100% { transform: translateY(46px); opacity: 0; }
}

/* ---------- 简介 ---------- */
.prose { font-size: 1.04rem; line-height: 1.95; color: var(--ink-600); max-width: 56ch; }
.prose p { margin-bottom: 1.15em; }

.check-list { display: grid; gap: 15px; margin: 32px 0 36px; }
.check-list li {
  position: relative;
  padding-left: 28px;
  font-size: 1rem;
  color: var(--ink-600);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .5em;
  width: 15px; height: 1px;
  background: var(--gold-500);
}

.col-figure { position: relative; margin: 0; }
.col-figure img { width: 100%; border-radius: 0; background: var(--ink-050); }
.col-figure figcaption {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--ink-400);
  text-align: left;
}
/* 图片容器：为左下角徽章提供定位参照，使徽章始终压在图片上（而非落到 figure 底部） */
.figure-media { position: relative; }

.figure-badge {
  position: absolute;
  left: 0; bottom: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 22px;
  background: var(--navy-900);
}
.figure-badge strong { font-family: var(--font-num); font-size: 1.85rem; line-height: 1; color: #fff; font-weight: 400; }
.figure-badge strong em { font-style: normal; font-size: .8rem; margin-left: 4px; font-weight: 400; }
.figure-badge span { font-size: .73rem; letter-spacing: .12em; color: rgba(255, 255, 255, .58); }

/* 图片下方的信息条：填补左列高度，与右列视觉对齐 */
.figure-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 22px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.figure-facts > div {
  padding-left: 18px;
  border-left: 1px solid var(--line);
}
.figure-facts > div:first-child { padding-left: 0; border-left: none; }
.figure-facts dt {
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.figure-facts dd {
  margin: 8px 0 0;
  font-size: .97rem;
  font-weight: 500;
  color: var(--ink-800);
  line-height: 1.5;
}

/* ---------- 产品规格列表 ---------- */
.spec-list {
  border-top: 1px solid var(--line-strong);
  padding-left: 20px;
}

.spec-row {
  display: grid;
  grid-template-columns: 190px 1fr 230px;
  gap: 34px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color .22s var(--ease), padding-left .22s var(--ease);
}
.spec-row:not(.spec-head):hover {
  background: var(--navy-050);
  padding-left: 14px;
}

.spec-head {
  padding: 12px 0;
  border-bottom: 1px solid var(--line-strong);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-400);
}

.spec-col-1 { display: flex; flex-direction: column; gap: 4px; }
/* 材料代号：回归克制的纯文字，用字重和颜色建立识别度 */
.spec-code {
  display: block;
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--navy-800);
}
.spec-name { font-size: .9rem; color: var(--ink-500); line-height: 1.5; }

.spec-row { position: relative; }
/* 悬停时左侧出现极细的品牌色标记，替代常驻竖条 */
.spec-row:not(.spec-head)::before {
  content: "";
  position: absolute;
  left: 0;
  top: 30px;
  bottom: 30px;
  width: 2px;
  background: transparent;
  transition: background-color .28s var(--ease);
}
.spec-row:not(.spec-head):hover::before { background: var(--navy-600); }

.spec-col-2 { }
.spec-desc { margin: 0 0 9px; font-size: .96rem; line-height: 1.8; color: var(--ink-600); }
.spec-tags {
  margin: 0;
  font-size: .87rem;
  color: var(--gold-600);
  letter-spacing: .02em;
}

.spec-col-3 { font-size: .93rem; line-height: 1.8; color: var(--ink-500); }

.spec-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 40px;
  padding: 30px 32px;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold-500);
}
.spec-cta h3 { margin: 0 0 6px; font-size: 1.02rem; }
.spec-cta p { margin: 0; font-size: .87rem; color: var(--ink-500); max-width: 60ch; }
.spec-cta .btn { flex-shrink: 0; }

.note {
  margin-top: 32px;
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--ink-400);
}

/* ---------- 公司优势 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.adv-card {
  position: relative;
  padding: 34px 30px 36px;
  background: #fff;
  transition: background-color .25s var(--ease);
}
.adv-card:hover { background: var(--paper-warm); }
.adv-num {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-num);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--gold-500);
}
.adv-card h3 { font-size: 1.08rem; margin-bottom: 12px; }
.adv-card p { font-size: .96rem; line-height: 1.85; color: var(--ink-500); margin: 0; }
/* 悬停时左上角出现细线，作为克制的动效 */
.adv-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 0; height: 2px;
  background: var(--navy-800);
  transition: width .4s var(--ease-out);
}
.adv-card:hover::before { width: 100%; }


/* ---------- 服务流程（时间轴） ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.steps-item {
  position: relative;
  padding: 32px 30px 34px 0;
  border-bottom: 1px solid var(--line);
}
.steps-item:nth-child(3n+2),
.steps-item:nth-child(3n+3) {
  padding-left: 30px;
  border-left: 1px solid var(--line);
}
.steps-num {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-num);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .24em;
  color: var(--gold-600);
}
.steps-item h3 { font-size: 1.05rem; margin-bottom: 12px; }
.steps-item p { font-size: .95rem; line-height: 1.85; color: var(--ink-500); margin-bottom: 12px; }
.steps-meta {
  margin: 0 !important;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: .83rem !important;
  letter-spacing: .08em;
  color: var(--ink-400) !important;
}

/* ---------- 定制/资质/工厂（保留原结构，视觉统一） ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.flow-step {
  padding: 28px 26px 30px 0;
  border-bottom: 1px solid var(--line);
}
.flow-step:nth-child(3n+2), .flow-step:nth-child(3n+3) {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}
.flow-num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-num);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--gold-600);
}
.flow-step h3 { font-size: 1.03rem; margin-bottom: 10px; }
.flow-step p { font-size: .93rem; line-height: 1.82; color: var(--ink-500); }

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 56px;
  border-top: 1px solid var(--line);
}
.capability { padding: 28px 26px 28px 0; }
.capability + .capability { padding-left: 26px; border-left: 1px solid var(--line); }
.capability h3 {
  font-size: .7rem;
  margin-bottom: 14px;
  letter-spacing: .2em;
  color: var(--ink-400);
  text-transform: uppercase;
  font-weight: 500;
}
.capability p { font-size: .97rem; line-height: 1.85; color: var(--ink-600); }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .16);
}
.cert-card {
  position: relative;
  padding: 32px 28px;
  background: rgba(255, 255, 255, .06);
  transition: background-color .25s var(--ease);
}
.cert-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 0; height: 2px;
  background: var(--gold-400);
  transition: width .42s var(--ease-out);
}
.cert-card:hover { background: rgba(255, 255, 255, .12); }
.cert-card:hover::before { width: 100%; }
.cert-ico { display: none; }
.cert-card h3 { font-size: 1.04rem; margin-bottom: 10px; letter-spacing: .06em; font-weight: 500; }
.cert-card p { font-size: .89rem; line-height: 1.75; color: rgba(255, 255, 255, .62); margin: 0; }

.plant-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: clamp(40px, 5vw, 76px);
  align-items: start;
}
.plant-figure { margin: 0; }
.plant-figure img { width: 100%; }

.stat-list { display: grid; gap: 0; }
.stat-list > div {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.stat-list > div:first-child { padding-top: 0; }
.stat-list dt {
  font-size: .69rem;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.stat-list dd {
  margin: 10px 0 8px;
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink-900);
  letter-spacing: .02em;
}
.stat-list dd strong {
  font-family: var(--font-num);
  font-size: 1.55rem;
  color: var(--navy-800);
  font-weight: 400;
}
.stat-list p { margin: 0; font-size: .93rem; color: var(--ink-500); }

.app-strip {
  margin-top: clamp(44px, 5vw, 68px);
  padding-top: 34px;
  border-top: 1px solid var(--line);
}
.app-strip h3 {
  font-size: .69rem;
  letter-spacing: .22em;
  color: var(--ink-400);
  margin-bottom: 20px;
  text-transform: uppercase;
  font-weight: 500;
}
.app-strip ul { display: flex; flex-wrap: wrap; gap: 16px 32px; }
.app-strip li {
  font-size: .97rem;
  color: var(--ink-600);
}
.app-strip li::before {
  content: "";
  display: inline-block;
  width: 4px; height: 4px;
  margin-right: 11px;
  vertical-align: middle;
  background: var(--gold-500);
}

/* ---------- 滚动叙事：交错入场 + 数据计数 ---------- */
.scene-grid { align-items: start; }

/* 左列比右列短得多，吸附滚动让图片在阅读右侧长文时始终可见，
   避免左下方出现大片留白。sticky 同时提供定位上下文。 */
.scene-sticky {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  align-self: start;
}

/* 右列在窄屏时紧随图片 */
.scene-flow { padding-top: 0; }

/* 交错入场：容器内子元素依次出现 */
[data-stagger] > * {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .68s var(--ease-out), transform .68s var(--ease-out);
  will-change: opacity, transform;
}
[data-stagger] > *.is-in {
  opacity: 1;
  transform: none;
}
/* JS 未就绪或禁用动效时，内容必须可见 */
html:not(.scroll-story-ready) [data-stagger] > * {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-stagger] > * { opacity: 1; transform: none; }
}

/* 关键数据：细线分隔的四列，数字用窄体 */
.story-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 42px 0 38px;
  border-top: 1px solid var(--line);
}
.story-stat {
  padding: 22px 0 22px 22px;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.story-stat:nth-child(odd) { padding-left: 0; border-left: none; }
.story-stat strong {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.7rem, 3vw, 2.15rem);
  font-weight: 400;
  line-height: 1;
  color: var(--navy-800);
  letter-spacing: .01em;
}
.story-stat span {
  display: block;
  margin-top: 10px;
  font-size: .73rem;
  letter-spacing: .12em;
  color: var(--ink-400);
}

/* 滚动进度驱动的章节（预留：可用于后续视差增强） */
[data-scroll-scene] {
  --scene-progress: 0;
  --scene-ease: 0;
}

/* ---------- 优势卡图标 ---------- */
.adv-ico {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 22px;
  color: #fff;
  background: var(--navy-800);
  border-radius: var(--radius-sm);
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}
.adv-ico svg { width: 27px; height: 27px; }
.adv-card:hover .adv-ico { background: var(--navy-700); transform: translateY(-2px); }
.adv-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 0; height: 2px;
  background: var(--gold-500);
  transition: width .42s var(--ease-out);
}
.adv-card:hover::before { width: 100%; }

/* ---------- 材料矩阵（柱状对照） ---------- */
.matrix {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.matrix-head,
.matrix-row {
  display: grid;
  grid-template-columns: 110px repeat(6, minmax(0, 1fr));
  gap: 0;
  align-items: end;
}

.matrix-head {
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: .76rem;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--ink-400);
  text-transform: uppercase;
}
.matrix-head > span { text-align: center; }
.matrix-head .matrix-code { text-align: left; }

.matrix-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color .2s var(--ease);
}
.matrix-row:last-child { border-bottom: none; }
.matrix-row:hover { background: var(--paper-warm); }

.matrix-code {
  font-family: var(--font-num);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--navy-800);
  align-self: center;
}

/* 每格内的一根竖柱：高度按等级，用统一色阶（越深代表改性重心越强） */
.matrix-cell {
  position: relative;
  display: block;
  height: 64px;
  background-image: linear-gradient(to top, var(--navy-800) 0%, var(--navy-600) 100%);
  background-repeat: no-repeat;
  background-position: center bottom;
  background-size: 30px var(--h, 20%);
  transition: background-size .5s var(--ease-out);
}
/* 底部基线，让柱形有依托 */
.matrix-row .matrix-cell::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 40px;
  height: 1px;
  margin-left: -20px;
  background: var(--line-strong);
}
.matrix-cell[data-level="1"] { --h: 20%; opacity: .5; }
.matrix-cell[data-level="2"] { --h: 36%; opacity: .66; }
.matrix-cell[data-level="3"] { --h: 52%; opacity: .8; }
.matrix-cell[data-level="4"] { --h: 72%; opacity: .92; }
.matrix-cell[data-level="5"] { --h: 92%; opacity: 1; }

.matrix-legend {
  margin-top: 24px;
  font-size: .82rem;
  line-height: 1.8;
  color: var(--ink-400);
  max-width: 76ch;
}

/* ---------- 应用领域（浅色） ---------- */
.ind-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.ind-card {
  padding: 34px 30px;
  background: #fff;
  transition: background-color .25s var(--ease);
}
.ind-card:hover { background: var(--paper-warm); }
.ind-card h3 {
  font-size: 1.1rem;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  letter-spacing: .04em;
}
.ind-card p { font-size: .96rem; line-height: 1.85; color: var(--ink-500); margin: 0 0 14px; }
.ind-materials {
  margin: 0 !important;
  font-size: .87rem !important;
  letter-spacing: .04em;
  color: var(--gold-600) !important;
}
/* 浅底下的图标配色 */
.ind-ico {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-bottom: 22px;
  color: #fff;
  background: var(--navy-800);
  border-radius: var(--radius-sm);
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}
.ind-ico svg { width: 26px; height: 26px; }
.ind-card:hover .ind-ico { background: var(--gold-600); transform: translateY(-2px); }

/* ---------- 服务流程时间轴 ---------- */
.steps-item { position: relative; }

/* 序号节点：小方块 + 与之相连的细线，形成时间轴 */
.steps-dot {
  display: block;
  width: 34px;
  height: 34px;
  margin-bottom: 20px;
  background: var(--navy-800);
  border-radius: var(--radius-sm);
  position: relative;
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}
.steps-dot::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 10px; height: 10px;
  margin: -5px 0 0 -5px;
  border-top: 1.5px solid #fff;
  border-right: 1.5px solid #fff;
  transform: rotate(45deg);
}
.steps-item:hover .steps-dot { background: var(--gold-600); transform: translateY(-2px); }

/* 顶部横向连线：把六个步骤在视觉上串起来 */
.steps-item::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line-strong);
}
.steps-item:last-child::before { right: 0; }
/* 节点盖在连线上 */
.steps-dot { position: relative; z-index: 1; margin-top: -4px; }

@media (max-width: 960px) {
  .reel { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; max-width: 640px; }
  .shots { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }

  .steps-item::before { display: none; }
  .steps-dot { margin-top: 0; margin-bottom: 16px; }
}

/* ---------- 常见问题 ---------- */
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-item {
  border-bottom: 1px solid var(--line);
  transition: background-color .2s var(--ease);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink-800);
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  flex-shrink: 0;
  width: 11px; height: 11px;
  border-right: 1px solid var(--ink-400);
  border-bottom: 1px solid var(--ink-400);
  transform: rotate(45deg) translateY(-3px);
  transition: transform .3s var(--ease-out), border-color .2s var(--ease);
}
.faq-item[open] summary::after {
  transform: rotate(-135deg) translateY(-3px);
  border-color: var(--gold-500);
}
.faq-item summary:hover { color: var(--navy-800); }
.faq-body {
  padding: 0 0 26px;
  max-width: 88ch;
}
.faq-body p { font-size: .99rem; line-height: 1.9; color: var(--ink-500); margin: 0; max-width: 76ch; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(40px, 5vw, 84px);
  align-items: start;
}

.contact-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.contact-list li {
  display: flex;
  flex-wrap: nowrap;
  align-items: baseline;
  gap: 22px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.contact-list li > div { flex: 1 1 auto; min-width: 0; }
.ci-ico { display: none; }
.contact-list em {
  display: block;
  flex: 0 0 104px;
  width: 104px;
  font-style: normal;
  font-size: .69rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-400);
  white-space: nowrap;
}
.contact-list p {
  margin: 0;
  font-size: 1.03rem;
  color: var(--ink-800);
  line-height: 1.75;
  word-break: break-word;
}
.contact-list a { font-weight: 500; }

.contact-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 34px 0 20px; }

.map-hint {
  padding: 18px 0 0;
  font-size: .91rem;
  color: var(--ink-400);
  border-top: 1px solid var(--line);
}
.map-hint span { display: none; }

.contact-form {
  padding: clamp(30px, 3vw, 42px);
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-top: 2px solid var(--navy-800);
}
.contact-form h3 { margin-bottom: 8px; font-size: 1.08rem; }
.form-hint { margin-bottom: 26px; font-size: .89rem; color: var(--ink-400); }

.field { margin-bottom: 20px; }
/* 选「其他」后展开的输入框：轻微滑入，避免突兀 */
.field[hidden] { display: none; }
#fieldTypeOther:not([hidden]) {
  animation: fieldReveal .32s var(--ease-out) both;
}
@keyframes fieldReveal {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  #fieldTypeOther:not([hidden]) { animation: none; }
}
.field label {
  display: block;
  margin-bottom: 9px;
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--ink-500);
}
.req { color: var(--gold-600); font-weight: 400; }

.field input, .field select, .field textarea {
  width: 100%;
  padding: 13px 0;
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink-900);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  transition: border-color .22s var(--ease);
}
.field textarea { resize: vertical; min-height: 94px; }
.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-400) 50%),
                    linear-gradient(135deg, var(--ink-400) 50%, transparent 50%);
  background-position: calc(100% - 10px) 50%, calc(100% - 5px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 26px;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-bottom-color: var(--navy-800);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-300); }
.field.has-error input { border-bottom-color: #b4453c; }
.field-error { margin: 7px 0 0; font-size: .76rem; color: #b4453c; min-height: 0; }
.form-status { margin: 18px 0 0; font-size: .84rem; color: var(--navy-700); }
.form-status.is-error { color: #b4453c; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  padding: clamp(60px, 7vw, 92px) 0 30px;
  background: linear-gradient(170deg, #0d2740 0%, #0a1e33 62%, #081b2d 100%);
  color: rgba(255, 255, 255, .64);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -40%; left: 18%;
  width: 64%; height: 120%;
  background: radial-gradient(closest-side, rgba(58, 134, 190, .16), transparent 70%);
  pointer-events: none;
}
.site-footer > .wrap { position: relative; z-index: 1; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr .7fr 1fr;
  gap: clamp(40px, 5vw, 76px);
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.footer-brand { display: flex; gap: 15px; align-items: flex-start; }
.footer-brand .brand-mark {
  width: 48px; height: 48px;
  padding: 9px;
  background: #fff;
}
.footer-brand strong { display: block; font-size: 1rem; color: #fff; margin-bottom: 9px; font-weight: 500; letter-spacing: .05em; }
.footer-brand p { margin: 0; font-size: .93rem; line-height: 1.8; color: rgba(255, 255, 255, .6); }
.footer-slogan {
  margin-top: 12px !important;
  letter-spacing: .38em;
  color: rgba(255, 255, 255, .38) !important;
  font-size: .78rem !important;
}

.footer-nav h4, .footer-contact h4 {
  margin-bottom: 20px;
  font-size: .67rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .38);
}
.footer-nav { display: flex; flex-direction: column; gap: 11px; }
.footer-nav a { font-size: .95rem; color: rgba(255, 255, 255, .66); }
.footer-nav a:hover { color: #fff; }

.footer-contact p { margin-bottom: 11px; font-size: .95rem; line-height: 1.7; }
.footer-contact a { color: rgba(255, 255, 255, .76); }
.footer-contact a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  padding-top: 26px;
}
.footer-bottom p { margin: 0; font-size: .76rem; letter-spacing: .05em; color: rgba(255, 255, 255, .34); }
.footer-icp { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.footer-icp a { color: rgba(255, 255, 255, .46); }
.footer-icp a:hover { color: #fff; }
.footer-icp-hint { font-size: .7rem; color: rgba(255, 255, 255, .24); }
.footer-note { max-width: 620px; text-align: right; }

/* ---------- 悬浮按钮 ---------- */
.floating-contact {
  position: fixed;
  right: 26px; bottom: 30px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
  box-shadow: 0 6px 24px rgba(6, 20, 35, .1);
}
.floating-contact[hidden] { display: none; }
.fc-btn {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  font-size: .98rem;
  color: var(--ink-600);
  background: #fff;
  border: none;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.fc-btn:hover { background: var(--navy-800); color: #fff; }
.fc-wechat:hover { background: var(--gold-600); }
.fc-top { font-size: 1.02rem; }
.fc-top:hover { background: var(--ink-800); }

/* ---------- 滚动动效 ---------- */
.reveal { transition: opacity .62s var(--ease), transform .62s var(--ease); }
html.anim-ready .reveal {
  opacity: 0;
  transform: translateY(18px);
  will-change: opacity, transform;
}
html.anim-ready .reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .07s; }
.reveal[data-delay="2"] { transition-delay: .14s; }
.reveal[data-delay="3"] { transition-delay: .21s; }
.reveal[data-delay="4"] { transition-delay: .28s; }
.reveal[data-delay="5"] { transition-delay: .35s; }

/* ---------- 生产实拍 ---------- */
.reel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  max-width: 780px;
}
.reel-item { margin: 0; }

.reel-frame {
  position: relative;
  background: var(--navy-950);
  overflow: hidden;
  cursor: pointer;
}
.reel-video {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  background: var(--navy-950);
}

/* 播放/暂停按钮：右下角悬浮 */
.reel-toggle {
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 50%;
  background: rgba(6, 20, 35, .55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}
.reel-toggle:hover { background: rgba(6, 20, 35, .8); border-color: #fff; }

/* 播放三角形 */
.reel-toggle::before {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  margin: -6px 0 0 -4px;
  border-style: solid;
  border-width: 6px 0 6px 10px;
  border-color: transparent transparent transparent #fff;
  transition: opacity .2s var(--ease);
}
/* 暂停双竖线 */
.reel-toggle::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 10px; height: 12px;
  margin: -6px 0 0 -5px;
  opacity: 0;
  background: linear-gradient(to right, #fff 0 3px, transparent 3px 7px, #fff 7px 10px);
  transition: opacity .2s var(--ease);
}
.reel-frame.is-playing .reel-toggle::before { opacity: 0; }
.reel-frame.is-playing .reel-toggle::after { opacity: 1; }

.reel-item figcaption {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: .84rem;
  letter-spacing: .04em;
  color: var(--ink-500);
}

/* 照片网格（竖屏 3:4） */
.shots {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 46px;
}
.shot {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
  text-align: left;
  font-family: inherit;
}
.shot img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--ink-050);
  transition: opacity .25s var(--ease);
}
.shot:hover img { opacity: .82; }
.shot-cap {
  display: block;
  margin-top: 10px;
  font-size: .76rem;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--ink-400);
}

/* 图片灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 28px;
  background: rgba(6, 20, 35, .95);
  animation: lbIn .22s var(--ease-out) both;
}
.lightbox[hidden] { display: none; }
@keyframes lbIn { from { opacity: 0; } to { opacity: 1; } }

.lightbox-inner {
  margin: 0;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.lightbox img {
  max-width: 100%;
  max-height: 82vh;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .5);
}
.lightbox figcaption {
  font-size: .84rem;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .7);
  text-align: center;
}
.lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  padding: 0;
  font-size: 1.6rem;
  line-height: 1;
  color: rgba(255, 255, 255, .8);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .3);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.lightbox-close:hover { background: rgba(255, 255, 255, .14); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  .lightbox { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  .nav a { padding: 10px 10px; font-size: .83rem; }
  .spec-row { grid-template-columns: 170px 1fr 200px; gap: 26px; }
}

/* 平板 / 小笔记本：页头放不下完整电话与八项导航，电话收成图标、导航再收紧一档 */
/* 1160px 以下：导航项放不下，切换为汉堡菜单 */
@media (max-width: 1160px) {
  .header-actions .btn-ghost .nowrap { display: none; }
  .nav-toggle { display: block !important; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 0 var(--gutter) 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .24s var(--ease), transform .24s var(--ease), visibility .24s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav a { padding: 15px 2px; font-size: .95rem; border-bottom: 1px solid var(--line); white-space: normal; }
  .nav a:last-child { border-bottom: none; }
  .nav a::after { display: none; }
  .nav a.is-active { color: var(--navy-800); }
}

@media (max-width: 960px) {
  :root { --header-h: 60px; }

  .nav-toggle { display: block; }

  .grid-2, .plant-grid, .contact-grid { grid-template-columns: 1fr; }
  .col-figure { order: -1; }
  .scene-sticky { position: static; }  /* 单列布局下吸附无意义 */

  /* 规格列表在窄屏变为块状 */
  .spec-row { grid-template-columns: 1fr; gap: 14px; padding: 24px 0; }
  .spec-head { display: none; }
  .spec-col-1 { flex-direction: row; align-items: baseline; gap: 12px; }
  .spec-row:not(.spec-head):hover { padding-left: 0; }

  .adv-grid, .ind-grid, .cert-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps, .flow, .capability-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .steps-item:nth-child(3n+2), .steps-item:nth-child(3n+3),
  .flow-step:nth-child(3n+2), .flow-step:nth-child(3n+3) {
    padding-left: 0;
    border-left: none;
  }
  .steps-item:nth-child(even), .flow-step:nth-child(even) {
    padding-left: 26px;
    border-left: 1px solid var(--line);
  }
  .capability + .capability { border-left: none; padding-left: 0; }
  .capability { border-bottom: 1px solid var(--line); }

  .hero { min-height: auto; padding-top: calc(var(--header-h) + 76px); }
  .hero-facts { margin-top: 48px; }

  .footer-grid { grid-template-columns: 1fr; gap: 38px; }
  .footer-note { text-align: left; }
}

@media (max-width: 640px) {
  .reel { grid-template-columns: 1fr; gap: 22px; }
  .shots { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .reel-item figcaption { margin-top: 10px; padding-top: 10px; font-size: .8rem; }
  .lightbox { padding: 16px; }
  .lightbox img { max-height: 74vh; }

  :root { --gutter: 20px; }

  body { font-size: 15px; }
  .section { padding: clamp(64px, 12vw, 96px) 0; }

  /* 窄屏页头：压紧间距与控件，避免语言切换器把整行挤爆 */
  .header-inner { gap: 12px; }
  .header-actions { gap: 8px; }
  .header-actions .btn-ghost .nowrap { display: none; }  /* 只留 ☎ 图标 */
  .lang-switch .lang-opt { padding: 5px 7px; font-size: .7rem; }
  .brand-text strong { font-size: .9rem; letter-spacing: .04em; }
  .brand-long { display: none; }
  .brand-short { display: inline; }

  .hero-eyebrow { font-size: .67rem; letter-spacing: .22em; padding-left: 38px; }
  /* 副标语带 .46em 字距，英文在窄屏会撑出横向滚动，压缩字距并允许折行兜底 */
  .hero-slogan { flex-wrap: wrap; gap: 12px; font-size: .76rem; letter-spacing: .18em; }
  .hero-lede { font-size: .94rem; line-height: 1.95; }
  .hero-cta { gap: 10px; }
  .hero-cta .btn { flex: 1 1 auto; padding: 13px 22px; }
  .hero-facts { grid-template-columns: repeat(2, 1fr); gap: 28px 0; margin-top: 40px; }
  .hero-facts li:nth-child(3) { padding-left: 0; border-left: none; }
  .hero-scroll { display: none; }

  .adv-grid, .ind-grid, .cert-grid,
  .steps, .flow, .capability-grid { grid-template-columns: 1fr; }
  .steps-item, .flow-step { padding: 26px 0 !important; border-left: none !important; }

  .spec-cta { flex-direction: column; align-items: flex-start; padding: 24px 22px; }

  /* 材料矩阵：七列在窄屏放不下，改为容器内横向滚动。
     英文列名是整词（Processing / Dim. stability），中文可逐字断行，
     所以必须给列固定宽度，否则英文会把版心撑破。 */
  .matrix {
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }
  .matrix-head,
  .matrix-row {
    grid-template-columns: 60px repeat(6, 58px);
    min-width: 408px;
  }
  .matrix-head { font-size: .62rem; letter-spacing: .02em; }

  .contact-list li { grid-template-columns: 1fr; gap: 8px; }
  .contact-cta .btn { flex: 1 1 100%; }
  .floating-contact { right: 16px; bottom: 18px; }
  .fc-btn { width: 40px; height: 40px; }
  .figure-badge { padding: 12px 16px; }
  .figure-badge strong { font-size: 1.5rem; }
  .faq-item summary { font-size: .92rem; padding: 20px 0; }
}

@media (max-width: 400px) {
  .brand-text em { display: none; }
  .hero-facts strong { font-size: 1.35rem; }
}

/* 超宽视口：容器适度放宽，避免大屏两侧留白过多（1440 及以下完全不受影响） */
@media (min-width: 1600px) {
  :root { --wrap: 1320px; }
}

/* 跨文档过渡：支持的浏览器上，语言切换与站内跳转会有平滑淡入，减少白屏感 */
@view-transition { navigation: auto; }

/* ---------- 无障碍 / 打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero-media img { transform: none; }
}

@media print {
  .site-header, .floating-contact, .hero-scroll, .contact-form { display: none !important; }
  .hero { min-height: auto; color: #000; }
  .hero-veil, .hero-grid { display: none; }
  .reveal { opacity: 1; transform: none; }
  body { color: #000; }
}